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Old 04-29-2016, 10:37 AM   #1
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Trouble with mortise entry lock


My front door has a mortise lock set. The main latch works fine, however the built in deadbolt (top lock) is having trouble. I've tightened the 2 bolts as tight as I can, however the key lock won't stay tight, it will rotate with the key when turning. Something I'm doing wrong?

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Old 04-29-2016, 12:31 PM   #2
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Re: Trouble with mortise entry lock


Could be stripped interior.

Best bet it to just pull the thing out and give it a tune up of sorts.

Once you pull it out, how they work makes perfect sense.
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Old 04-29-2016, 12:52 PM   #3
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Re: Trouble with mortise entry lock


If you don't want to fix that yourself---most lock shops will rebuild those old units and send it back as good as new.
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Old 04-29-2016, 01:27 PM   #4
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Re: Trouble with mortise entry lock


Great thanks. I've taken apart smaller interior door ones but this one is a different beast. It must be stripped or somehow not catching the lock cylinder. I'll grab a couple more pics when o get home.
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Old 05-01-2016, 02:48 AM   #5
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Re: Trouble with mortise entry lock


So I removed the trim piece and discovered that if the cylinder was turned 7 times the lock worked fine. With the trim piece on I could only get 6 turns so I forced it a pipe wrench and now it works! Thanks.
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